Some realization ways of measurement are discussed, including the maximum output power, output amplitude and noise bandwidth.
讨论了低频噪声源的最大输出功率、噪声输出幅度以及噪声带宽测试的实现途径。
2
In the measurement of sound absorption coefficient in random incidence and determination of sound power levels of noise sources, the reverberation room is used very extensively.
Because it is related to the magnitude of noise RMS voltage, the frequency characteristic of circuit and the power spectrum of noise source, the accuracy of measurement is quite low.